Mechanical movem en i



(No Mqdel.)

s. L. HARwww,y MECHANICAL MOVEMENT.

No. 594,741. Paten-ted Nv. so, 1897-.

a f my r v Q Q @l @l Q M -i RMN@ MWHQNJ H@ M y i f, mV Q 7 y /NVENTOH l W/TNESSES milretire A'rnNr rrrcrn SUMPT'ER LEA HARWOOD, OF UTOWTN, ALABAMA.

SKECIEGATION forming part of Letters Patent No.v 594,741, dated November 30, 1897.

ipplication tiled pril 29,1897. Serial No. 634,379.

(No modeld ral/ h/urzy zr may concern.' ie it known that I, SUMPTER LEA HAR- woon, of Uniontown, in the County of Perry and Si' te oi Ala-berna, have invented e new 5 end improved ifechenical Movement, of'

whieh the following is e full, clear, and exact deeeriptirni.

ill, tion relates to an improvement in movements intended for transreeiproceting into rotary motion and the eppo. -teg and it eonsists, essentially, of a ehait divided into two sections, erich section being' spireliy grooved, but in opposite directions, end, o' a collar enga-ging each of these mentions, 'to the other, and at the same time for preventing; the rotation oi' theeollars except in one 'lireretien.

jiteerenee is to he had to the eeeoxnpenying zo dren-finge, forming a part of this specification,

in which ,similar cheraeters oi' reference indi- 1 eerresponding parte in ell the views.

rifare i is aplan view'of my device. Fig. ion taken through one oi the sleeves, the ineens by which motion iseom- :d to the shaft; and lfig. 3 is a detail erf oi one end of the same, showing the 'et oonneetionhetween two parts thereof.

My ini.' ntion is intended for application to me ianism where it is desired to transorni fiproeating into rotary motion and possesses the advantage of having no deadeen ter and that the stroke of the reciprocating member may be varied without its nite-otling the rotation oi the shaft.

The Shaft A is formed with oppositely-running spiral threads at the ends thereof. These threads nmy meet in. the center. Each seetien ot the shaft is provided with a nut hav ing; nie-zins for engaging the threads of the shalt. and, as shown in the drawings, this of severa-l parte. The inner pora sleeve 'which is provided with :L sei oi v,inn-tn r ,s 3', adapted to receive i li I et a size to i'it the grooves formed by 'eads en the shaft. immediately ontthe sleeve l is a ball-retainer D, conof n. thin sleeve surrounding the sleeve ii, sens te re tnin the-*bells in place. 'lhisbnlh retniner may he omitted, it' desired. Outside this haii-retainer is the sleeve E, which is sepa-rated from the bail-retainer orl the inner fio end ineens for moving one relative sleeve it' the ball-retziiner is omitted by balls f, which will form a bearing,r upon which the two ninv slide.

The sleeve E and the sleeve B haveA a li1n-' ited reci proeation relative to yeaoh other. One end of the sleeve E is provided with ratchetteeth E and the opposing end ofl the sleeve B is provided with a collar having ratchetf teeth B', or provided with pins which act es a substitute for the ratchet-teeth. Vifhen the sleeve E is moved so that the two sets of ratchet-teeth engage each other, the sleeves B and E are looked together. Further reciproeation in that direction will, if the nut is prevented from rotating, engage the balls C with the grooves in the shaft A end rotate the shaft. l/Vhen the return reoiproeation is commenced, the outer sleeve is tirst freed from the ratchet-teeth or pins upon the sleeve B; .As the reeiproezttion is continued the bells .will enga-ge the sha-ft as before, but the inner sleeve l-S being f ree to rotate it will he rotated by the shaft. Each end of the shaft is provided with such a nut l?, the relative positions ofthe nuts boing, however, reversed, so that the outer sleeve of one nut is looked to its inner sleevc,'\vhile in the other nut the two are seperated. This leaves one nut free to not as e driver at all times, while the other is free to turn upon the shaft. The two nuts are connected by means ot' a clamp G, which embraces the nut, and by bars l1, which engage the ela-mp G, and bya handle ll. This compels the two nuts to reciprocate toether. lt is immaterial in which direction tney are moved. The rotation of the shaft will be in the saine direction in either ease. It is also immaterial whether the length of the recip reen-tion is partial or complet-e. lf desired,

the shaft may have a spiral in one direction v only,

ICO

section, having holes therein, balls in .said holes adapted to engage the spiral grooves, a ball-retaining sleeve immediately outside said sleeve, an outer sleeve surrounding the whole, the outer and inner sleeves being provided with ratchet-engaging means to pernit free revolution in one (Erection and prevent revfolution in 'the other direction, andv a common connection between the outer sleeves, sul` stantially as described.

SUMPTER LEA HARWOGD'. Witnesses:

B. F.v HARWOOD, Jr., J. HARRY WHIT 

